A survey of variation in the chemical composition of commercial canola meal produced in Western Canadian crushing plants

1991 ◽  
Vol 71 (2) ◽  
pp. 469-480 ◽  
Author(s):  
J. M. Bell ◽  
M. O. Keith
Keyword(s):  
Press Cake ◽  
Neutral Detergent Fiber ◽  
Canola Meal ◽  
Glucosinolate Content ◽  
Western Canada ◽  
Composition Variation ◽  
Gross Energy ◽  
The Mean ◽  
Whole Seed ◽  
Mineral Concentrations

Canola samples of whole seed, press cake and commercial meal (CM) were collected from seven canola-crushing plants in Western Canada over 4 successive weeks to assess nutrient and glucosinolate content and variability. The CM data are described in this report. The mean concentrations in CM (dry matter (DM) basis) were: in %, crude protein (N × 6.25) 41.85; ether extract 3.92; crude fiber 13.13; neutral detergent fiber 23.54; acid detergent fiber 19.09; and in MJ kg−1, gross energy 20.36. The mean mineral concentrations were, in percent, calcium 0.70; magnesium 0.57; phosphorus 1.13; potassium 1.35; sulfur 0.94; and in μg g−1, copper 6.34; iron 157; manganese 54.7; molybdenum 1.5; selenium 1.22; zinc 75.8. Total aliphatic glucosinolate concentrations (oil-free DM basis) ranged from 6.26 to 28.42 μmol g−1 for different plants, mean 16.20; indolyl glucosinolate concentrations were from 0.56 to 9.49 μmol g−1. Small and variable amounts of allyl and hydroxybenzyl glucosinolates due to weed seed contamination were found. Myrosinase activity (thioglucoside glucohydrolase EC 3.2.3.1) averaged 0.15% of that in the corresponding canola seed. Differences among crushing plants were due mainly to regional environmental factors, cultivars used and, for lysine and glucosinolates, processing conditions mainly in the desolventizer toaster stage. Key words: Canola, meal, composition, variation, regional, Western Canada

Performance of growing-finishing pigs fed barley-based diets containing toasted or non-toasted canola meal

2005 ◽  
Vol 85 (1) ◽  
pp. 53-59 ◽  
Author(s):  
P. A. Thacker ◽  
R. W. Newkirk
Keyword(s):  
Weight Gain ◽  
Soybean Meal ◽  
Feed Intake ◽  
Control Diet ◽  
Dietary Treatment ◽  
Canola Meal ◽  
Glucosinolate Content ◽  
Feed Conversion ◽  
Gross Energy ◽  
Similar Weight

Eighty crossbred pigs (28.7 ± 3.9 kg BW) were assigned to one of five dietary treatments in a factorial design experiment (sex × treatment). The control diet was formulated using barley and soybean meal, while four experimental diets were formulated with either toasted or non-toasted canola meal replacing either half or all of the soybean meal in the test diets. The total glucosinolate content of the non-toasted meal was more than 15-fold higher than the to asted meal (1.01 vs. 15.58 µmol g-1). The principal glucosinolates in the non-toasted meal were 3-butenyl (3.05 µmol g-1), 2-OH-3-butenyl (5.47 µmol g-1) and 4-OH-3-methylindoyl (4.68 µmol g-1). Digestibility coefficients for dry matter, crude protein, and gross energy were significantly (P < 0.05) lower for the toasted and non-toasted canola meal diets compared with the soybean meal diet. There were no significant differences (P > 0.05) in digestibility coefficients between the two canola meals. Digestibility coefficients were higher (P < 0.05) for pigs fed the diets in which canola meal supplied only 50% of the supplementary protein compared with diets in which 100% of the supplementary protein was supplied by canola meal. Pigs fed toasted canola meal had similar weight gain, feed intake and feed conversion (P > 0.05) as pigs fed soybean meal while pigs fed non-toasted canola meal had lower weight gain and feed intake (P < 0.05) than pigs fed soybean meal. Feed conversion was unaffected by dietary treatment (P > 0.05). There were no significant effects (P < 0.05) due to diet on any carcass trait. The overall results of this experiment indicate that omitting the desolventization/toasting procedure from the process involved in the production of canola meal did not result in an improvement in the performance of pigs fed diets containing canola meal. Key words: Pigs, canola meal, performance, digestibility, carcass, toasting

Composition and digestibility of canola press cake as a feedstuff for use in swine diets

1991 ◽  
Vol 71 (3) ◽  
pp. 879-885 ◽  
Author(s):  
M. O. Keith ◽  
J. M. Bell
Keyword(s):  
Crude Protein ◽  
Press Cake ◽  
Sampling Period ◽  
Growing Pigs ◽  
Canola Meal ◽  
Period Effects ◽  
Gross Energy ◽  
Swine Diets ◽  
Amino Acid Concentrations ◽  
Myrosinase Activity

Samples of canola press cake (PC) were collected from seven crushing plants in Western Canada over four successive weekly sampling periods to assess its nutrient and glucosinolate composition and variability. The digestibility of energy and crude protein (CP) (N × 6.25) of PC in growing pigs was also determined. Compared to canola meal (CM), PC contained more ether extract (EE) (21.21 vs. 3.92%), more gross energy (GE) (23.92 vs. 20.36 MJ kg−1) and less CP (34.10 vs. 41.85%), dry matter (DM) basis (P < 0.05). There were significant differences (P < 0.05) among crushing plants in the contents of EE, GE and CP in PC with the largest differences observed in EE; sampling period effects were small for all three components. Plant and period effects on amino acid concentrations in PC were similar to those effects on CP. Glucosinolate concentrations (oil-extracted DM basis) showed only slight reductions in PC from those in canola seed (CS). Both CS and PC concentrations were greater than in CM (P < 0.05) but myrosinase activity in PC was reduced to 0.65% of that in CS compared to 0.15% remaining in CM. Differences were found in total aliphatic glucosinolate concentrations among crushing plants (P < 0.05) (mean 23.75 μmol g−1) with only minor period effects. The digestibility of GE in PC was 75 % and of CP 75%. On DM basis PC contained 17.94 M J of digestible energy kg−1 and 25.6% digestible CP. Key words: Canola, press cake, composition, variability, digestibility, pigs

scholarly journals PSXI-15 Effects of post-pyrolysis treated biochars on nutrient disappearance, methane production and ruminal fermentation of a silage-based diet in an artificial rumen system (RUSITEC)

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 395-395
Author(s):  
Paul Tamayao ◽  
Gabriel O Ribeiro ◽  
Tim A McAllister ◽  
Hee-Eun Yang ◽  
A M Saleem ◽  
...  
Keyword(s):  
Protein Synthesis ◽  
Block Design ◽  
Gas Production ◽  
Neutral Detergent Fiber ◽  
Canola Meal ◽  
Acid Mixture ◽  
Vitamin Supplement ◽  
Microbial Protein ◽  
Microbial Protein Synthesis ◽  
Barley Silage

Abstract This study investigated the effects of post-pyrolysis treated biochar on nutrient disappearance, total gas and methane (CH4) production, rumen fermentation and microbial protein synthesis in an artificial rumen system (RUSITEC) fed a barley silage-based diet. The basal diet consisted of 60% barley silage, 27% barley grain, 10% canola meal and 3% mineral/vitamin supplement (DM basis). Three spruced-based biochars, treated post-pyrolysis with either zinc chloride, hydrochloric acid/nitric acid mixture or sulfuric acid were added at 2.0% of substrate DM. In a randomized complete block design, treatments were assigned to sixteen vessels (n = 4/treatment) in two RUSITEC systems. The experiment was conducted over 15 d, with 8 d of adaptation and 7 d of sampling. Nutrient disappearance of dry matter (DM), organic matter (OM), acid detergent fiber (ADF) and neutral detergent fiber (NDF) was determined after 48 h of incubation from d 9 to 12, and microbial protein synthesis was measured from d 13–15. Data were analyzed using PROC MIXED in SAS, with the fixed effect of treatment and random effect of RUSITEC system and vessel. Biochar inclusion did not affect disappearance of DM (P = 0.49), OM (P = 0.60), CP (P = 0.14), NDF (P = 0.48), ADF (P = 0.11) or starch (P = 0.58). Biochar also had no effect on total gas production (P = 0.31) or CH4 produced expressed as a % of total gas production (P = 0.06), mg/d (P = 0.70), mg/g of DM incubated (P = 0.74), or mg/g of DM digested (P = 0.64). No effect on total VFA (P = 0.56) or NH3-N (P = 0.20) production were observed. Neither microbial protein synthesis nor total protozoa count were affected by biochar addition (P &gt; 0.05). In conclusion, biochar inclusion in a silage-based diet did not exhibit the potential to mitigate CH4 emissions or improve digestion in a RUSITEC system.

scholarly journals The influence of xylanase on the fermentability, digestibility, and physiochemical properties of insoluble corn-based fiber along the gastrointestinal tract of growing pigs

2021 ◽  
Author(s):  
Amy L Petry ◽  
Nichole F Huntley ◽  
Michael R Bedford ◽  
John F Patience
Keyword(s):  
Mixed Model ◽  
Linear Mixed Model ◽  
Nutrient Digestibility ◽  
Growing Pigs ◽  
Neutral Detergent Fiber ◽  
Adaptation Period ◽  
High Fiber ◽  
Gross Energy ◽  
Digesta Viscosity ◽  
The Impact

Abstract In theory, supplementing xylanase in corn-based swine diets should improve nutrient and energy digestibility and fiber fermentability, but its efficacy is inconsistent. The experimental objective was to investigate the impact of xylanase on energy and nutrient digestibility, digesta viscosity, and fermentation when pigs are fed a diet high in insoluble fiber (&gt;20% neutral detergent fiber; NDF) and given a 46-d dietary adaptation period. Three replicates of 20 growing gilts were blocked by initial body weight, individually housed, and assigned to 1 of 4 dietary treatments: a low-fiber control (LF) with 7.5% NDF, a 30% corn bran high-fiber control (HF; 21.9% NDF), HF+100 mg xylanase/kg [HF+XY, (Econase XT 25P; AB Vista, Marlborough, UK)] providing 16,000 birch xylan units/kg; and HF+50 mg arabinoxylan-oligosaccharide (AXOS) product/kg [HF+AX, (XOS 35A; Shandong Longlive Biotechnology, Shandong, China)] providing AXOS with 3-7 degrees of polymerization. Gilts were allowed ad libitum access to fed for 36-d. On d 36, pigs were housed in metabolism crates for a 10-d period, limit fed, and feces were collected. On d 46, pigs were euthanized and ileal, cecal, and colonic digesta were collected. Data were analyzed as a linear mixed model with block and replication as random effects, and treatment as a fixed effect. Compared with LF, HF reduced the apparent ileal digestibility (AID), apparent cecal digestibility (ACED), apparent colonic digestibility (ACOD), and apparent total tract digestibility (ATTD) of dry matter (DM), gross energy (GE), crude protein (CP), acid detergent fiber (ADF), NDF, and hemicellulose (P&lt;0.01). Relative to HF, HF+XY improved the AID of GE, CP, and NDF (P&lt;0.05), and improved the ACED, ACOD, and ATTD of DM, GE, CP, NDF, ADF, and hemicellulose (P&lt;0.05). Among treatments, pigs fed HF had increased hindgut DM disappearance (P=0.031). Relative to HF, HF+XY improved cecal disappearance of DM (162 vs. 98g; P=0.008) and NDF (44 vs. 13g; P&lt;0.01). Pigs fed xylanase had a greater proportion of acetate in cecal digesta and butyrate in colonic digesta among treatments (P&lt;0.05). Compared with LF, HF increased ileal, cecal, and colonic viscosity, but HF+XY decreased ileal viscosity compared with HF (P&lt;0.001). In conclusion, increased insoluble corn-based fiber decreases digestibility, reduces cecal fermentation, and increases digesta viscosity, but supplementing xylanase partially mitigated that effect.

scholarly journals Effects of Defatted Rice Bran Inclusion Level on Nutrient Digestibility and Growth Performance of Different Body Weight Pigs

Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1374
Author(s):  
Bingbing Huang ◽  
Huangwei Shi ◽  
Li Wang ◽  
Lu Wang ◽  
Zhiqian Lyu ◽  
...  
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Rice Bran ◽  
Nutrient Digestibility ◽  
Growing Pigs ◽  
Neutral Detergent Fiber ◽  
Control Group ◽  
Defatted Rice Bran ◽  
Gross Energy ◽  
Stage 1

This study was conducted to determine the effects of low-protein diet prepared with different levels of defatted rice bran (DFRB) and weight stages on growth performance and nutrient digestibility of growing–finishing pigs. The animal experiment included three stages. A total of 240 growing pigs with an initial body weight of 28.06 ± 8.56 kg for stage 1 were allocated to five diets including one control group and four DFRB diets supplemented with 2.5%, 5%, 7.5% and 10% DFRB, respectively. The 192 crossbred pigs with initial body weights of 55.03 ± 7.31 kg and 74.55 ± 9.10 kg were selected for stage 2 and stage 3, respectively. Pigs were allocated to four diets including one control group and three DFRB diets supplemented with 10%, 15% and 20% DFRB, respectively. The results showed that with the increase in DFEB intake, the gain: feed was linearly increased (p < 0.05), and the average daily feed intake tended to linearly decrease (p = 0.06) in stage 1. Except for the apparent total tract digestibility (ATTD) of acid detergent fiber (ADF) in stage 3, levels of DFRB had significant effects on the ATTD of gross energy (GE), dry matter (DM), ash, neutral detergent fiber (NDF) and ADF in three weight stages. In stage 1, with the increase in levels of DFRB, the ATTD of NDF and hemicellulose were firstly increased and then decreased (p < 0.01). In stage 2, with the increasing levels of DFRB, the ATTD of DM, ash and cellulose were firstly increased and then decreased (p < 0.01). In stage 3, the ATTD of GE, DM, ash, NDF and hemicellulose decreased linearly with the increase in levels of DFRB (p < 0.01). Collectively, DFRB could be used as a replacement for corns and soybean meal, and weight stage is important to consider when adjusting the additive proportion.

CHEMICAL COMPOSITION OF AQUATIC MACROPHYTES I. INVESTIGATION OF ORGANIC CONSTITUENTS AND NUTRITIONAL POTENTIAL

1978 ◽  
Vol 58 (3) ◽  
pp. 829-841 ◽  
Author(s):  
A. JABBAR MUZTAR ◽  
S. J. SLINGER ◽  
J. H. BURTON
Keyword(s):  
Dry Matter ◽  
Aquatic Macrophytes ◽  
Nutritive Value ◽  
Myriophyllum Spicatum ◽  
Ash Content ◽  
Neutral Detergent Fiber ◽  
Mineral Matter ◽  
Cladophora Glomerata ◽  
Additional Processing ◽  
Gross Energy

Chemical analyses were conducted on unwashed samples of four aquatic plant species harvested at three progressive dates during 1974. All species showed an extremely high ash content. The ash content increased in Potamogeton spp. with progress in the harvesting time and varied only slightly in Cladophora glomerata. Myriophyllum spicatum and Vallisneria americana, harvested in September, were second growth, which was reflected in the much lower ash and considerably higher organic nutrient levels. The neutral-detergent fiber (NDF) level tended to be higher in all species for samples harvested in September. Acid-detergent fiber (ADF) was also higher during the same month except in Potamogeton spp. With the exception of Potamogeton spp., the level of acid-detergent lignin (ADL) was similar in all species at the different dates. Both NDF and ADF values were inflated because of unavoidable contamination with mineral matter. A further experiment with washed and unwashed plant samples harvested the following year showed that washing decreased the ash content markedly, in most cases with a concomitant increase in proximate constituents and gross energy values. All species, either washed or unwashed, were very low in dry matter (5–20%); the NDF and ADF levels for most plants were similar to those of alfalfa, while ADL content was relatively low. Results indicated that aquatic macrophytes would have nutritive value similar to alfalfa; however, their high ash and low dry matter contents would necessitate quality control and additional processing for possible use as feedstuffs.

Geographic determinants of copper and molybdenum concentrations in serum at the end of the grazing season and associations with reproductive performance in beef cows from western Canada

2011 ◽  
Vol 91 (3) ◽  
pp. 423-431 ◽  
Author(s):  
Leanne Van De Weyer ◽  
Cheryl Waldner
Keyword(s):  
Reproductive Performance ◽  
Important Determinant ◽  
Beef Cows ◽  
Western Canada ◽  
Serum Concentrations ◽  
Soil Color ◽  
Grazing Season ◽  
Cu Deficiency ◽  
The Mean ◽  
Feed Samples

Van De Weyer, L. M. and Waldner, C. L. 2011. Geographic determinants of copper and molybdenum concentrations in serum at the end of the grazing season and associations with reproductive performance in beef cows from western Canada. Can. J. Anim. Sci. 91: 423–431. Serum concentrations of Cu and Mo were measured at the end of the summer grazing season in an observational field study of 783 breeding females from 66 cow-calf herds located in western Canada. The mean Cu concentration was 0.82 ppm (S, 0.30 ppm) and the mean Mo concentration was 0.056 ppm (S, 0.055 ppm). Serum Cu concentration differed across ecoregions (P=0.013). Serum Mo concentrations varied by ecoregion (P =0.002), soil type (P =0.011), soil color (P=0.018), and total precipitation during the growing season (P =0.004). Copper and Mo serum concentrations at the end of the grazing season were not associated with reproductive outcomes. Herd location is an important determinant of the risk of primary and secondary Cu deficiency and can inform the need for trace mineral testing of feed samples as well as supplementation.

Nutritive values of double-low rapeseed expellers and rapeseed meal with or without supplementation of multi-enzyme in pigs

2020 ◽  
Vol 100 (4) ◽  
pp. 729-738
Author(s):  
Peili Li ◽  
Zhiqian Lyu ◽  
Lu Wang ◽  
Bingbing Huang ◽  
Changhua Lai
Keyword(s):  
Amino Acids ◽  
Basal Diet ◽  
Rapeseed Meal ◽  
Growing Pigs ◽  
Metabolizable Energy ◽  
Neutral Detergent Fiber ◽  
Energy Concentration ◽  
Available Energy ◽  
Gross Energy ◽  
Enzyme Supplementation

Two experiments were conducted to evaluate the effects of adding multi-enzyme on the available energy concentration and standardized ileal digestibility (SID) of amino acids of double-low rapeseed expellers (RSE) and rapeseed meal (RSM) fed to growing pigs. In Experiment 1, a total of 36 growing barrows were fed six diets in a replicated 3 × 2 factorial design. Diets included a corn–soybean meal basal diet, RSE diet, and RSM diet with or without multi-enzyme (1000 U g−1 of cellulase, 10 000 U g−1 of xylanase, 2000 U g−1 of glucanase, and 10 000 U g−1 of protease). In Experiment 2, a total of 30 crossbred pigs were randomly allotted to five diets consisting of a nitrogen-free diet and four cornstarch-based diets containing RSE or RSM with or without multi-enzyme. Multi-enzyme supplementation significantly improved (P < 0.05) the metabolizable energy (ME) value and apparent total tract digestibility (ATTD) of ether extract, neutral detergent fiber, and acid detergent fiber, and it tended to increase (P < 0.10) the ATTD of gross energy and digestible energy in ingredients. With the exception of phenylalanine, multi-enzyme supplementation increased (P < 0.05) the SID of crude protein (CP) and all amino acids (AA) in ingredients. Multi-enzyme supplementation enhanced fiber degradation and increased the ME value and SID of CP as well as most AA in double-low rapeseed co-products fed to pigs.

scholarly journals Digestibility of diets containing calcium salts of fatty acids or soybean oil in horses1

2020 ◽  
Vol 4 (2) ◽  
pp. 507-518 ◽  
Author(s):  
Laura K Fehlberg ◽  
James M Lattimer ◽  
Christopher I Vahl ◽  
James S Drouillard ◽  
Teresa L Douthit
Keyword(s):  
Fatty Acids ◽  
Treatment Time ◽  
Neutral Detergent Fiber ◽  
Serum Triglycerides ◽  
Calcium Salts ◽  
Lipid Source ◽  
Time Interaction ◽  
Gross Energy ◽  
Fermentation Parameters ◽  
Internal Marker

Abstract Calcium salts of fatty acids (CSFAs) frequently are fed to ruminants, but their fate in the equine digestive system is unknown. The purpose of this study was to compare Enertia s/f, a proprietary CSFAs, and soybean (SB) oil with respect to impact on apparent total tract nutrient digestion and cecal fermentation parameters in horses. Eight cecally cannulated Quarter Horses were used in a crossover design in which horses consumed a diet for 32 d consisting of 1.5% body weight (BW) (as-fed) smooth bromegrass hay and 0.5% BW (as-fed) pelleted concentrate containing 4.9% CSFAs or 4.1% SB oil. Fecal samples were collected every 4 h from day 30 to 32 of each period and analyzed for apparent total tract digestibilities of dry matter (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF), crude protein (CP), crude fat (CF), and gross energy (GE) using acid detergent insoluble ash as an internal marker. Cecal digesta was obtained at 0, 2, 4, 6, 8, 10, and 12 h following the morning meal on day 29 of each period and analyzed for pH and concentrations of volatile fatty acid (VFA) and long-chain fatty acids (LCFAs). Serum was collected on day 33 of each period following a 16-h fast and analyzed for triglycerides and cholesterol. Apparent total tract digestibilities of DM, NDF, ADF, CP, CF, and GE were unaffected by lipid source (P &gt; 0.10). Serum triglycerides tended to be greater in horses consuming CSFAs compared to SB (P = 0.10); however, serum cholesterol was not different (P = 0.45). In horses consuming SB, cecal pH decreased below baseline (hour 0) at hours 2, 4, and 6 (P &lt; 0.01), whereas cecal pH in horses consuming CSFAs was below baseline at hours 4 and 6 (P &lt; 0.01). There were no treatment or time effects on cecal pH (P &gt; 0.10). Cecal concentrations of total VFAs were greater in horses consuming SB compared to CSFAs at hour 2 (P = 0.01). Cecal concentrations of acetate, propionate, acetate:propionate (A:P), and butyrate were affected by time (P &lt; 0.01). Propionate was less at hour 2 in horses fed CSFAs compared to horses fed SB (P = 0.04). A treatment × time interaction was detected for total cecal LCFAs concentration (P &lt; 0.01); LCFAs concentration was greater at hour 2 for horses consuming CSFAs compared to horses fed SB (P = 0.02). SB oil and CSFAs have similar effects on the digestion of DM, NDF, ADF, GE, CF, and CP.

scholarly journals Effect of dietary supplementation of xylanase in a wheat-based diet containing canola meal on growth performance, nutrient digestibility, organ weight, and short-chain fatty acid concentration in digesta when fed to weaned pigs

2020 ◽  
Vol 98 (3) ◽  
Author(s):  
Gustavo A Mejicanos ◽  
Gemma González-Ortiz ◽  
Charles Martin Nyachoti
Keyword(s):  
Growth Performance ◽  
Feed Intake ◽  
Dietary Supplementation ◽  
Nutrient Digestibility ◽  
Organ Weight ◽  
Neutral Detergent Fiber ◽  
Short Chain ◽  
Canola Meal ◽  
Weaned Pigs ◽  
Main Factors

Abstract This study was designed to determine the effect of dietary supplementation of xylanase on growth performance, nutrient digestibility, organ weight, digesta pH, and concentration of short-chain fatty acids (SCFA) of weaned pigs fed wheat–canola meal (CM) diets over a 35-d period. A total of 144 piglets (72 barrows and 72 gilts) weaned at 18 ± 2 d of age, with initial body weight (BW) of 6.2 ± 0.7 kg, received one of eight dietary treatments based on randomized complete block design. BW and feed intake were recorded weekly to calculate average daily gain (ADG), average daily feed intake (ADFI), and feed efficiency (G:F). Treatments consisted of a control wheat–soybean meal-based diet and wheat-regular (RCM), dehulled (DCM), or coarse CM (CCM) without and with 16,000 BXU/kg xylanase (Econase XT). All diets contained 500 FTU/kg of phytase (Quantum Blue 5G) and titanium dioxide (0.3%). Apparent total tract digestibility (ATTD) of neutral detergent fiber (NDF), crude protein (CP), phosphorous (P), calcium (Ca), dry matter, and diet were determined. On day 35, one pig per pen was euthanized to evaluate the main factors of protein, xylanase supplementation, and sex on organ weight, ileal and colon digesta pH, and colon digesta concentrations of SCFA. The main factors did not affect growth performance. Xylanase supplementation improved nutrient digestibilities in all diets and increased ileal and colonic digesta pH without affecting the growth performance of weaned pigs fed wheat and CM-based diets. A protein–xylanase effect (P &lt; 0.05) resulted in increasing the ATTD of NDF from 28% to 32% and from 29% to 37% for RCM and DCM, respectively. The ATTD of CP was greater (P &lt; 0.05) with xylanase supplementation (75% vs. 70%). Xylanase supplementation increased ATTD of P and Ca. A three-way interaction (P &lt; 0.05) for protein–xylanase–gender for colon pH, acetic, and propionic acid in the colon digesta of pigs indicated that, in addition to the protein source, piglet sex could have influenced how xylanase works. Xylanase supplementation increased (P &lt; 0.05) the weight of the liver and spleen and tended (P &lt; 0.10) to increase the size of the kidney. In conclusion, dietary supplementation of xylanase increased nutrient digestibility and digesta pH but did not influence the growth performance of weaned pigs fed wheat and CM-based diets over a 35-d period.

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